/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseGizmos/CombinedTransformGizmo.h
Broadcast at the end of a SetActiveTarget call. Using this, an adapter such as a numerical UI widget can bind to the gizmo at construction and still be able to initialize using the transform proxy once that is set.
typedef TMulticastDelegate_TwoParams< void, [UCombinedTransformGizmo](API\Runtime\InteractiveToolsFramework\BaseGizmos\UCombinedTransformGizmo) *, [UTransformProxy](API\Runtime\InteractiveToolsFramework\BaseGizmos\UTransformProxy) * > FOnSetActiveTarget